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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: WritableResource.html 745 2013-10-11 16:08:37Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.vaadin7;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.vaadin.server.StreamResource;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.io.IOException;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.io.InputStream;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.io.OutputStream;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span>import org.dellroad.stuff.io.NullModemInputStream;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import org.dellroad.stuff.io.WriteCallback;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>/**<a name="line.19"></a>
<span class="sourceLineNo">020</span> * Support superclass for {@link StreamResource} implementations that can be more easily implemented<a name="line.20"></a>
<span class="sourceLineNo">021</span> * by writing to an {@link OutputStream} than providing an {@link InputStream}.<a name="line.21"></a>
<span class="sourceLineNo">022</span> *<a name="line.22"></a>
<span class="sourceLineNo">023</span> * @see &lt;a href="http://dev.vaadin.com/ticket/5145"&gt;Vaadin Ticket #5145&lt;/a&gt;<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>@SuppressWarnings("serial")<a name="line.25"></a>
<span class="sourceLineNo">026</span>public abstract class WritableResource extends StreamResource implements WriteCallback {<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>    /**<a name="line.28"></a>
<span class="sourceLineNo">029</span>     * Constructor.<a name="line.29"></a>
<span class="sourceLineNo">030</span>     *<a name="line.30"></a>
<span class="sourceLineNo">031</span>     * @param filename resource file name<a name="line.31"></a>
<span class="sourceLineNo">032</span>     */<a name="line.32"></a>
<span class="sourceLineNo">033</span>    protected WritableResource(final String filename) {<a name="line.33"></a>
<span class="sourceLineNo">034</span>        super(null, filename);<a name="line.34"></a>
<span class="sourceLineNo">035</span>        this.setStreamSource(new StreamResource.StreamSource() {<a name="line.35"></a>
<span class="sourceLineNo">036</span>            @Override<a name="line.36"></a>
<span class="sourceLineNo">037</span>            public InputStream getStream() {<a name="line.37"></a>
<span class="sourceLineNo">038</span>                return new NullModemInputStream(WritableResource.this, "WritableResource for \"" + filename + "\"");<a name="line.38"></a>
<span class="sourceLineNo">039</span>            }<a name="line.39"></a>
<span class="sourceLineNo">040</span>        });<a name="line.40"></a>
<span class="sourceLineNo">041</span>    }<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>    /**<a name="line.43"></a>
<span class="sourceLineNo">044</span>     * Convenience constructor that also sets the MIME type.<a name="line.44"></a>
<span class="sourceLineNo">045</span>     *<a name="line.45"></a>
<span class="sourceLineNo">046</span>     * @param filename resource file name<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * @param mimeType resource MIME type<a name="line.47"></a>
<span class="sourceLineNo">048</span>     */<a name="line.48"></a>
<span class="sourceLineNo">049</span>    protected WritableResource(String filename, String mimeType) {<a name="line.49"></a>
<span class="sourceLineNo">050</span>        this(filename);<a name="line.50"></a>
<span class="sourceLineNo">051</span>        this.setMIMEType(mimeType);<a name="line.51"></a>
<span class="sourceLineNo">052</span>    }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span>    /**<a name="line.54"></a>
<span class="sourceLineNo">055</span>     * Write the resource contents to the given {@link OutputStream} and then close it.<a name="line.55"></a>
<span class="sourceLineNo">056</span>     *<a name="line.56"></a>
<span class="sourceLineNo">057</span>     * &lt;p&gt;<a name="line.57"></a>
<span class="sourceLineNo">058</span>     * Note that the {@link com.vaadin.server.VaadinSession} associated with this resource will &lt;b&gt;not&lt;/b&gt; be locked<a name="line.58"></a>
<span class="sourceLineNo">059</span>     * when this method is invoked.<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * &lt;/p&gt;<a name="line.60"></a>
<span class="sourceLineNo">061</span>     *<a name="line.61"></a>
<span class="sourceLineNo">062</span>     * @param output resource output stream<a name="line.62"></a>
<span class="sourceLineNo">063</span>     * @throws IOException if an I/O error occurs<a name="line.63"></a>
<span class="sourceLineNo">064</span>     */<a name="line.64"></a>
<span class="sourceLineNo">065</span>    @Override<a name="line.65"></a>
<span class="sourceLineNo">066</span>    public abstract void writeTo(OutputStream output) throws IOException;<a name="line.66"></a>
<span class="sourceLineNo">067</span>}<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>




























































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